Perhaps somebody is confused about the body being widened because the cars with flared fenders are referred to as wide bodies.
Roland wrote the flares were fiberglass, I believe him. As Franz wrote, all of the Embo coached cars had dropped floor pans. It is very easy to lower the car if shocks with adjustable spring pre-load have been installed, you just screw the adjusters lower on the body of the shock. And as you inferred, that does mean the car will bottom out more easily over bumps.
Just avoid those bumps!
yor friend on the DTBB